Trolley.



W. I. BAKER.

TROLLEY.

APPLICATION FILED JAN.29, 1907.

Patented Jan. 19, 1909.

TINTTED STATES PATENT FFTCE.

WILLIS J. BAKER, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OF ONE-HALF TO WILLIAM FLETCHER MITCHELL, OF BALTIMORE, MARYLAND.

TROLLEY.

Specification of Letters Petent.

Patented Jan. 19, 1909.

Application filed January 29, 1907. Serial No. 354,767.

To all whom it may concern:

Be it known that I, WILLIS J. BAKER, a citizen of the United States of America, residing at Washington, District of Columbia, have invented new and useful Improvements in Trolleys, of which the following is a specification.

This invention relates to improvements in trolleys and relates more particularly to that class that will prevent the trolley wheel from coming off the wire.

The object of the invention is to simplify and improve the existing art by providing an apparatus which is extremely simple in construction and whereby a trolley wheel may be retained at all times in contact with the feed wire, and in case an obstruction is met the trolley wheel will be permitted to pass such obstruction without becoming disengaged.

Another object of the invention is to provide means whereby the trolley wheel may be easily disengaged from the feed wire and readily placed upon the wire when desired.

To these ends the invention resides in the novel construction of parts and their assemblage in operative combination as will hereinafter be more fully described and claimed.

The preferred embodiment of my invention is fully and clearly illustrated in the acompanying drawings which are to be taken as part of this specification.

In the drawings,-Figure 1 is a perspective view showing the application of my invention. Fig. 2 is a top plan view of the same. Fig. 3 is a top plan view of another form of my device. Fig. 1 is a horizontal section of the same. Fig. 5 is a perspective view of one of the retaining fingers. Fig. 6 is a perspective view of the angular spacing block. Fig. 7 is a perspective view of a trolley axle, which may be employed.

Similar numerals of reference indicate corresponding parts throughout the several views.

In the drawings, 1 indicates the trolley wheel, 2 the arms or harp in which the wheel is mounted and 3 the trolley pole which carries the harp, these parts being of the ordinary construction, and the wheel 1 being adapted to engage the feed wire A in the usual manner.

Rig-idly secured to the axle 5 of the trolley wheel 1 are spacing or bearing blocks 6 having rectangular openings 7 which are adapted for engagement with the squared portions 8 of the axle 5 and the outwardly projecting portions 9 provided with the angular bearing surface 10, which is provided with a stop or projection 10.

The angular face 10 of the spacing blocks 6 is provided with a screw threaded orifice 11 which receives the trunnion or axle 11 of retaining members or guards 12.

The guards 12 comprise vertical arms 13 provided with eyes 14 and weighted at their lower extremities, as at 15, and a shorter horizontal finger 16, which is adapted to occupy a position above the trolley wheel 1 and at an acute angle in relation to the plane of the wire and the axle 5 of the trolley wheel 1. The trolley moves in the direction of the arrow a, and with this construction it will be readily seen that should an obstruction such as the hanger support B contact with the fingers 16 of the guards 12, the fingers being at an angular plane in relation to the point of contact will receive a gliding or a glancing blow from the obstruction and upon contacting said arms will rotate upon their angular bearings and swing outwardly and away from said obstruction and under the influence of the weighted arms 13 return to normal position.

It will also be seen that the stop 10 will prevent the guards swinging beyond a vertical position upon their return from contact with the obstruction, and that the weighted portions 15 of the guards will efliciently retain the fingers 16 in normally operative position over the trolley wheel.

Should an obstruction, such as the cross wire C be met the guards will rotate upon their axles in the direction of the arrow Z) and upon passing said obstruction will under the influence of the weighted members readily resume their normal position over the trolley wheel.

Thus far this invention has been referred to as comprising a pair of arms and a pair of angular spacing blocks, but by referring to Figs. 3 and 4 it will be readily seen that a single guard and spacing block might be effectively employed. Also, this invention is not limited to the employment of spacing blocks, as trolley axles, such as shown in Fig. 6, or a guard provided with an angular boss, as shown in dotted lines in Fig. 5, mi ht be substituted with equal efliciency.

cord 17, or other suitable flexible connection is adapted for engagement with'the 7 eyes 1% of the guards 12, to provide for the disengagementof the trolley from the wire. It will be readily seen that in pulling the cord 17 the guards 12 will rotate upon/the axles l1 and move away from the trolley. wheel 1 and. the feed wire A and allow the trolley wheel to be lowered.

Having thus described the invention, what is claimed as new, is

1. The combination of a trolley arm and wheel carried thereby, of rigidly secured spacing blocks having angular bearing faces, guards provided with horizontal fingers adapted to occupy a position above the trolley wheel, and depending vertical arms weighted at their treeen'ds, said vertical arms being pivoted to the angular faces of said spacing blocks for rotation thereon.

'2. The combination of a trolley arm and wheel carried thereby, of rigidly secnred spacing blocks having angular bearing faces, guards provided with horizontal fingers adapted to occupy a position above the trolley wheel, and depending vertical arms weighted at their free ends,, said verti ca1 arms being pivoted to the angular faces of said spacing blocks for rotation thereon and "being provided with eyes for the reception of cords or cables w'herebythe arms may be rotated.

In testimony whereof, I afiix my signatnre in presence of two witnesses.

WILLIS J. BAKER/ Witnesses WM. J. Korean, FRANK W. HoUeH. 

